Sprue and runner bars for metal casting



FIG. 1 is a perspective view of a sprue and runner bars for metal casting showing my new design.

FIG. 2 is a top view thereof.

FIG. 3 is a bottom view thereof.

FIG. 4 is a radial side view thereof along one of the runner bars.

FIG. 5 is a cross-sectional view of a runner bar taken along the line 5--5 of FIG. 2.

The design is symmetrical about the longitudinal axis of the sprue and FIG. 4 is a typical side view along the axis of a runner bar. 

The ornamental design for a sprue and runner bars for metal casting, substantially as shown and described. 